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Sheet stacking apparatus and image forming apparatus

Inactive Publication Date: 2006-11-23
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0007] An object of the present invention is to make it possible that all sheet stack trays can stack sheets up to the maximum number of sheets to be stacked, prevent the number of sheets to be stacked from decreasing in the whole sheet processing apparatus and decrease the temporary number of interrupt times.
[0008] Another object of the present invention is to be possible to stack sheets up to the maximum number of sheets to be stacked on all sheet stack trays of a sheet processing apparatus. Therefore, it is possible to prevent the number of sheets to be stacked in the whole sheet processing apparatus from decreasing. Moreover, because it is possible to decrease the number of temporary interrupt times of jobs, the sheet processing efficiency is not deteriorated.

Problems solved by technology

Furthermore, as described above, when the number of sheets to be stacked is decreased, the number of times the job is interrupted increases.

Method used

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  • Sheet stacking apparatus and image forming apparatus
  • Sheet stacking apparatus and image forming apparatus
  • Sheet stacking apparatus and image forming apparatus

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Embodiment Construction

[0022] Hereafter, by referring to the accompanying drawings, preferred embodiments of the present invention are illustratively described in detail. An embodiment of an image forming apparatus having a sheet processing apparatus is described below. In this case, a copying machine is shown as an image forming apparatus and a finisher is shown as a sheet processing apparatus.

[0023] First, a schematic configuration of the whole of an image forming apparatus is described by referring to FIG. 1. FIG. 1 is a sectional view showing an internal structure of the whole of an image forming apparatus which is an embodiment of the present invention.

[0024] As shown in FIG. 1, an image forming apparatus 10 has a printer 100 serving as an image forming part and an image reader 200 serving as an image reading part. Moreover, the image forming apparatus 10 has a document feeder 400, finisher 500 serving as a sheet stacking apparatus and operation display part 600.

[0025] The document feeder 400 is m...

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PUM

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Abstract

A sheet stacking apparatus has a stack tray which can move so that a sheet stack surface keeps a constant position from a discharge outlet and which is a finisher capable of using the stack tray by switching it. When stacking the maximum number of sheets to be stacked on the stack tray and preventing stacking of sheets on the stack tray up to the maximum number of sheets to be stacked and the number of sheets stacked on the stack tray reaches a predetermined number of sheets to be stacked which does not prevent up to the maximum number of sheets from being stacked on the stack tray, stacking of sheets on the stack tray is temporarily prohibited to stack sheets by switching to the stack tray. Thereby, all sheet stack trays can stack up to the maximum number of sheets to be stacked, decrease of the number of stacked sheets is prevented in the whole sheet stacking apparatus and the number of temporal interruptions of a job is decreased.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a sheet stacking apparatus for stacking sheets output from an image forming apparatus such as a copying machine, printer or facsimile, particularly to a sheet stacking apparatus so that all stack trays can stack the maximum number of sheets to be stacked to prevent the number of sheets to be stacked of the whole apparatus and decrease the number of temporary interrupt times of jobs and an image forming apparatus having the sheet stacking apparatus. [0003] 2. Related Background Art [0004] A sheet processing apparatus as a sheet stacking apparatus is conventionally proposed which successively conveys sheets in which an image is recorded by an image forming apparatus into the sheet processing apparatus and selectively applies predetermined processing such as punch processing, stapling or sorting. Some of the sheet processing apparatus respectively have a plurality of sheet stack trays (...

Claims

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Application Information

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IPC IPC(8): B65H39/10
CPCB65H31/24B65H39/11B65H2408/1131B65H2511/30B65H2513/42B65H2801/06B65H2220/01B65H2220/02B65H43/06
Inventor MIYAKE, TOSHIYUKIMURATA, MITSUSHIGEFUJII, TAKAYUKI
Owner CANON KK
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